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Information Regarding Members of the Board of Directors and Group Management - Summary of Remuneration to Members of the Board of Directors (Detail) - Board [Member] - SEK (kr) kr in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023
Disclosure of Information About Board Management and Employees [line items] |  |
Board fees | kr 13,763,000 |
Value at grant date of synthetic shares allocated | kr 7,298,566 |
Number of previously allocated synthetic shares outstanding | 119,359 |
Net change in value of synthetic shares | kr 8,471,425 |
Committee fees | 3,067,600 |
Total fees paid in cash | 8,944,350 |
Total remuneration | kr 24,714,341 | kr 11,850,877
Synthetic shares [member] |  |
Disclosure of Information About Board Management and Employees [line items] |  |
Number of synthetic shares | 130,076 |
Total Including Resigned Board [Member] |  |
Disclosure of Information About Board Management and Employees [line items] |  |
Board fees | kr 13,763,000 |
Value at grant date of synthetic shares allocated | kr 7,298,566 |
Number of previously allocated synthetic shares outstanding | 173,770 |
Net change in value of synthetic shares | kr 10,396,596 |
Committee fees | 3,067,600 |
Total fees paid in cash | 8,944,350 |
Total remuneration | kr 26,639,512 | 9,615,320
Total Including Resigned Board [Member] | Synthetic shares [member] |  |
Disclosure of Information About Board Management and Employees [line items] |  |
Number of synthetic shares | 130,076 |
Jan Carlson [member] |  |
Disclosure of Information About Board Management and Employees [line items] |  |
Board fees | kr 4,640,000 |
Number of synthetic shares | 62,021 |
Portion of Board fee | 75.00% |
Value at grant date of synthetic shares allocated | kr 3,479,998 |
Number of previously allocated synthetic shares outstanding | 25,948 |
Net change in value of synthetic shares | kr 2,987,549 |
Committee fees | 440,000 |
Total fees paid in cash | 1,600,000 |
Total remuneration | 8,067,547 | 4,082,525
Jacob Wallenberg [member] |  |
Disclosure of Information About Board Management and Employees [line items] |  |
Board fees | kr 1,175,000 |
Number of synthetic shares | 15,705 |
Portion of Board fee | 75.00% |
Value at grant date of synthetic shares allocated | kr 881,208 |
Number of previously allocated synthetic shares outstanding | 25,948 |
Net change in value of synthetic shares | kr 1,423,458 |
Committee fees | 195,000 |
Total fees paid in cash | 488,750 |
Total remuneration | 2,793,416 | 487,525
Carolina Dybeck Happe [member] |  |
Disclosure of Information About Board Management and Employees [line items] |  |
Board fees | kr 587,500 |
Number of previously allocated synthetic shares outstanding | 10,003 |
Net change in value of synthetic shares | kr 321,797 |
Total remuneration | 321,797 | (166,650)
Christy Wyatt [member] |  |
Disclosure of Information About Board Management and Employees [line items] |  |
Board fees | kr 1,175,000 |
Number of synthetic shares | 15,705 |
Portion of Board fee | 75.00% |
Value at grant date of synthetic shares allocated | kr 881,208 |
Net change in value of synthetic shares | 530,358 |
Committee fees | 200,000 |
Total fees paid in cash | 493,750 |
Total remuneration | 1,905,316 | 1,325,000
Eric A. Elzvik [member] |  |
Disclosure of Information About Board Management and Employees [line items] |  |
Board fees | kr 1,175,000 |
Number of synthetic shares | 5,235 |
Portion of Board fee | 25.00% |
Value at grant date of synthetic shares allocated | kr 293,736 |
Number of previously allocated synthetic shares outstanding | 8,648 |
Net change in value of synthetic shares | kr 474,439 |
Committee fees | 540,000 |
Total fees paid in cash | 1,421,250 |
Total remuneration | kr 2,189,425 | 1,355,889
Helena Stjernholm [member] |  |
Disclosure of Information About Board Management and Employees [line items] |  |
Number of previously allocated synthetic shares outstanding | 17,298 |
Net change in value of synthetic shares | kr 595,375 |
Total remuneration | 595,375 | 766,726
Jon Fredrik Baksaas [member] |  |
Disclosure of Information About Board Management and Employees [line items] |  |
Board fees | kr 1,175,000 |
Number of synthetic shares | 10,470 |
Portion of Board fee | 50.00% |
Value at grant date of synthetic shares allocated | kr 587,472 |
Number of previously allocated synthetic shares outstanding | 17,298 |
Net change in value of synthetic shares | kr 948,947 |
Committee fees | 540,000 |
Total fees paid in cash | 1,127,500 |
Total remuneration | 2,663,919 | 1,015,455
Jonas Synnergren [member] |  |
Disclosure of Information About Board Management and Employees [line items] |  |
Board fees | kr 1,175,000 |
Number of synthetic shares | 15,705 |
Portion of Board fee | 75.00% |
Value at grant date of synthetic shares allocated | kr 881,208 |
Net change in value of synthetic shares | 530,358 |
Committee fees | 505,000 |
Total fees paid in cash | 798,750 |
Total remuneration | 2,210,316 | 1,610,000
Kristin S. Rinne [member] |  |
Disclosure of Information About Board Management and Employees [line items] |  |
Board fees | kr 1,175,000 |
Number of synthetic shares | 5,235 |
Portion of Board fee | 25.00% |
Value at grant date of synthetic shares allocated | kr 293,736 |
Number of previously allocated synthetic shares outstanding | 14,216 |
Net change in value of synthetic shares | kr 659,144 |
Committee fees | 395,000 |
Total fees paid in cash | 1,276,250 |
Total remuneration | 2,229,130 | 1,051,307
Kjell-Åke Soting [member] | Employee representatives [member] |  |
Disclosure of Information About Board Management and Employees [line items] |  |
Board fees | 51,750 |
Committee fees | 21,600 |
Total fees paid in cash | 73,350 |
Total remuneration | 73,350 | 76,950
Annika Salomonsson [member] | Employee representatives [member] |  |
Disclosure of Information About Board Management and Employees [line items] |  |
Board fees | 51,750 |
Committee fees | 19,800 |
Total fees paid in cash | 71,550 |
Total remuneration | 71,550 | 69,150
Karl Aberg [member] |  |
Disclosure of Information About Board Management and Employees [line items] |  |
Board fees | 1,175,000 |
Committee fees | 195,000 |
Total fees paid in cash | 1,370,000 |
Total remuneration | 1,370,000 |
Ulf Rosberg [member] | Employee representatives [member] |  |
Disclosure of Information About Board Management and Employees [line items] |  |
Board fees | 51,750 |
Committee fees | 14,400 |
Total fees paid in cash | 66,150 |
Total remuneration | 66,150 | 63,750
Loredana Roslund [member] | Deputy Employee Representatives [member] |  |
Disclosure of Information About Board Management and Employees [line items] |  |
Board fees | 51,750 |
Total fees paid in cash | 51,750 |
Total remuneration | 51,750 | 54,750
Frans Frejdestedt [member] | Deputy Employee Representatives [member] |  |
Disclosure of Information About Board Management and Employees [line items] |  |
Board fees | 51,750 |
Total fees paid in cash | 51,750 |
Total remuneration | 51,750 | 29,250
Stefan Wanstedt [member] | Deputy Employee Representatives [member] |  |
Disclosure of Information About Board Management and Employees [line items] |  |
Board fees | 51,750 |
Committee fees | 1,800 |
Total fees paid in cash | 53,550 |
Total remuneration | kr 53,550 | kr 29,250

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